/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  m_version.c: Shows ircd version information.
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 *  $Id: m_version.c 147 2005-12-26 02:52:10Z jon $
 */

#include "stdinc.h"
#include "handlers.h"
#include "client.h"
#include "ircd.h"
#include "numeric.h"
#include "s_conf.h"
#include "s_serv.h"
#include "s_user.h"
#include "send.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"

static char *confopts(struct Client *);
static void m_version(struct Client *, struct Client *, int, char *[]);
static void ms_version(struct Client *, struct Client *, int, char *[]);
static void mo_version(struct Client *, struct Client *, int, char *[]);

/* Option string. */
static const char serveropts[] = {
	' ',
	'T',
	'S',
#ifdef TS_CURRENT
	'0' + TS_CURRENT,
#endif
/* ONLY do TS */
/* ALWAYS do TS_WARNINGS */
	'o',
	'w',
	'\0'
};

struct Message version_msgtab = {
	"VERSION", 0, 0, 0, 0, MFLG_SLOW, 0,
	{m_unregistered, m_version, ms_version, m_ignore, mo_version, m_ignore}
};

#ifndef STATIC_MODULES
void
_modinit(void)
{
	mod_add_cmd(&version_msgtab);
}

void
_moddeinit(void)
{
	mod_del_cmd(&version_msgtab);
}

const char *_version = "$Revision: 147 $";
#endif

/*
 * m_version - VERSION command handler
 *      parv[0] = sender prefix
 *      parv[1] = remote server
 */
static void
m_version(struct Client *client_p, struct Client *source_p, int parc, char *parv[])
{
	static time_t last_used = 0;

	if((last_used + ConfigFileEntry.pace_wait_simple) > CurrentTime)
	{
		/* safe enough to give this on a local connect only */
		sendto_one(source_p, form_str(RPL_LOAD2HI), me.name, source_p->name);
		return;
	}
	else
		last_used = CurrentTime;

	if(!ConfigFileEntry.disable_remote)
	{
		if(hunt_server(client_p, source_p, ":%s VERSION :%s", 1, parc, parv) != HUNTED_ISME)
			return;
	}

	sendto_one(source_p, form_str(RPL_VERSION),
		   me.name, source_p->name, ircd_version, serno,
		   me.name, confopts(source_p), serveropts);
	show_isupport(source_p);
}

/*
 * mo_version - VERSION command handler
 *      parv[0] = sender prefix
 *      parv[1] = remote server
 */
static void
mo_version(struct Client *client_p, struct Client *source_p, int parc, char *parv[])
{

	if(hunt_server(client_p, source_p, ":%s VERSION :%s", 1, parc, parv) != HUNTED_ISME)
		return;

	sendto_one(source_p, form_str(RPL_VERSION), me.name, parv[0], ircd_version,
		   serno, me.name, confopts(source_p), serveropts);

	show_isupport(source_p);
}

/*
 * ms_version - VERSION command handler
 *      parv[0] = sender prefix
 *      parv[1] = remote server
 */
static void
ms_version(struct Client *client_p, struct Client *source_p, int parc, char *parv[])
{
	if(hunt_server(client_p, source_p, ":%s VERSION :%s", 1, parc, parv) == HUNTED_ISME)
	{
		sendto_one(source_p, form_str(RPL_VERSION),
			   ID_or_name(&me, client_p),
			   ID_or_name(source_p, client_p),
			   ircd_version, serno, me.name, confopts(source_p), serveropts);
		show_isupport(source_p);
	}
}

/* confopts()
 *
 * input  - client pointer
 * output - ircd.conf option string
 * side effects - none
 */
static char *
confopts(struct Client *source_p)
{
	static char result[12];
	char *p = result;

	if(ConfigChannel.use_except)
		*p++ = 'e';
	if(ConfigFileEntry.glines)
		*p++ = 'G';
	*p++ = 'g';

	/* might wanna hide this :P */
	if(ServerInfo.hub && (!ConfigFileEntry.disable_remote || IsOper(source_p)))
	{
		*p++ = 'H';
	}

	if(ConfigChannel.use_invex)
		*p++ = 'I';
	if(ConfigChannel.use_knock)
		*p++ = 'K';
	*p++ = 'M';

	if(ConfigFileEntry.ignore_bogus_ts)
		*p++ = 'T';
#ifdef USE_SYSLOG
	*p++ = 'Y';
#endif
#ifdef HAVE_LIBZ
	*p++ = 'Z';
#endif
	*p++ = '6';

	*p = '\0';

	return result;
}
